/* 50 Hz Power Solutions — site styles */
:root{
  --ink:#111C42; --navy:#1B2A5E; --slate:#4A5880; --muted:#6B7591;
  --paper:#F7F6F2; --white:#FFFFFF; --line:#E3E1DA; --line-strong:#D5D3CA;
  --amber:#F5C518; --amber-ink:#8A6A00; --amber-soft:#FCF6E1; --mist:#C9D3EA;
  --display:'Inter Tight','Inter',system-ui,sans-serif; --body:'Inter',system-ui,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,monospace; --bn:'Hind Siliguri','Inter',sans-serif;
  --wrap:1280px; --gut:clamp(16px,4vw,40px); --r:12px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--display);font-weight:600;letter-spacing:-.035em;line-height:1.02;margin:0;text-wrap:balance}
p{margin:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding-left:var(--gut);padding-right:var(--gut)}
.bn{font-family:var(--bn)}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--slate);text-transform:uppercase}
.lead{font-size:18px;color:var(--slate);max-width:600px}
.muted{color:var(--slate)}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:12px;min-height:54px;padding:0 26px;border-radius:8px;font-weight:600;font-size:16px;border:1.5px solid transparent;cursor:pointer;transition:transform .2s,background .2s,box-shadow .2s;font-family:var(--body)}
.btn:hover{transform:translateY(-1px)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark svg{stroke:var(--amber)}
.btn-amber{background:var(--amber);color:var(--ink)}
.btn-amber:hover{box-shadow:0 14px 32px -12px rgba(245,197,24,.8)}
.btn-line{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost{border-color:rgba(255,255,255,.35);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.link{background-image:linear-gradient(var(--amber),var(--amber));background-size:100% 2px;background-position:0 100%;background-repeat:no-repeat;padding:4px 0;font-weight:600;transition:background-size .25s;display:inline-flex;align-items:center;min-height:44px}
.link:hover{background-size:0 2px}

/* announcement + header */
.announce{display:block;background:var(--ink);color:#fff;font-size:14px}
.announce .wrap{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:6px 12px;padding-top:10px;padding-bottom:10px}
.badge{font-family:var(--mono);font-size:11px;letter-spacing:.08em;background:var(--amber);color:var(--ink);padding:2px 8px;border-radius:4px}
.announce .more{color:var(--amber);font-weight:600}
.site-header{border-bottom:1px solid var(--line);background:var(--paper);position:sticky;top:0;z-index:50}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:16px;padding-bottom:16px}
.logo img{height:44px;width:auto}
.nav{display:flex;align-items:center;gap:2px}
.nav a{padding:10px 14px;border-radius:999px;font-size:15px;font-weight:500;min-height:44px;display:inline-flex;align-items:center;transition:background .2s}
.nav a:hover{background:#ECEAE3}
.nav a[aria-current="page"]{font-weight:700;box-shadow:inset 0 -2px 0 var(--amber);border-radius:0}
.header-cta{display:flex;align-items:center;gap:10px}
.header-cta .phone{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15px;min-height:44px}
.menu-btn{display:none;background:none;border:1px solid var(--line-strong);border-radius:8px;width:44px;height:44px;align-items:center;justify-content:center;cursor:pointer;color:var(--ink)}
@media (max-width:980px){
  .menu-btn{display:inline-flex}
  .nav,.header-cta .phone{display:none}
  .site-header.open .nav{display:flex;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;background:var(--paper);border-bottom:1px solid var(--line);padding:8px var(--gut) 16px}
  .site-header .wrap{position:relative}
  .header-cta .btn{min-height:44px;padding:0 14px;font-size:14px;white-space:nowrap;gap:6px}
  .header-cta .btn svg{display:none}
}

/* sections */
.section{padding-top:clamp(72px,8vw,120px);padding-bottom:40px}
.section-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:36px}
.section-head .title{display:flex;flex-direction:column;gap:16px}
.h2{font-size:clamp(36px,4.4vw,60px);letter-spacing:-.04em;line-height:1}
.h1{font-size:clamp(46px,6.6vw,104px);letter-spacing:-.045em;line-height:.95}
.dot{color:var(--amber)}

/* hero */
.hero{display:flex;flex-wrap:wrap;align-items:center;gap:56px;padding-top:clamp(40px,6vw,88px);padding-bottom:72px}
.hero-copy{flex:7 1 520px;min-width:0;display:flex;flex-direction:column;gap:28px}
.hero-art{flex:5 1 380px;min-width:0;position:relative}
.hero-art .frame{overflow:hidden;border-radius:var(--r);background:#FBEFD2;box-shadow:0 1px 0 var(--line),0 40px 80px -48px rgba(17,28,66,.45)}
.hero-art .chip{position:absolute;left:clamp(-24px,-2vw,0px);bottom:-28px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px;box-shadow:0 24px 48px -28px rgba(17,28,66,.45);min-width:220px;display:flex;flex-direction:column;gap:6px}
.live{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--slate)}
.live i{width:8px;height:8px;border-radius:50%;background:#3DD68C;animation:pulse 1.8s ease-out infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(61,214,140,.6)}100%{box-shadow:0 0 0 8px rgba(61,214,140,0)}}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(160px,100%),1fr));gap:20px;border-top:1px solid var(--line);padding-top:22px;margin:18px 0 0}
.stats dd{margin:0;font-family:var(--display);font-size:32px;line-height:1.1;font-weight:600;letter-spacing:-.03em}
.stats dt{font-size:14px;color:var(--slate)}
.stats div{display:flex;flex-direction:column-reverse;gap:2px}

/* trust */
.trust{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.trust .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px 40px;padding-top:26px;padding-bottom:26px}
.trust .names{display:flex;flex-wrap:wrap;gap:18px 48px;font-family:var(--display);font-size:22px;font-weight:600;letter-spacing:-.02em;color:var(--navy)}

/* index rows */
.split{display:flex;flex-wrap:wrap;gap:48px}
.split > .side{flex:1 1 300px;min-width:0;display:flex;flex-direction:column;gap:16px}
.split > .main{flex:2 1 600px;min-width:0}
.rows{border-top:1px solid var(--ink)}
.row{display:grid;grid-template-columns:56px minmax(0,1fr) auto;align-items:center;gap:8px 20px;padding:26px 12px;border-bottom:1px solid var(--line);transition:background .25s}
.row:hover{background:#fff}
.row .num{font-family:var(--mono);font-size:13px;color:var(--slate)}
.row .t{font-family:var(--display);font-size:clamp(22px,2.4vw,32px);line-height:1.1;font-weight:600;letter-spacing:-.03em;display:block}
.row .d{font-size:15px;color:var(--slate);display:block;margin-top:4px}
.circle{width:44px;height:44px;border-radius:50%;border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;transition:background .25s,border-color .25s;flex:none}
.row:hover .circle,.cell:hover .circle{background:var(--amber);border-color:var(--amber)}

/* case studies */
.cases{display:flex;flex-wrap:wrap;gap:16px}
.case-dark{flex:3 1 560px;min-width:0;position:relative;overflow:hidden;background:var(--ink);color:#fff;border-radius:var(--r);padding:clamp(28px,3.6vw,48px);display:flex;flex-direction:column;gap:28px}
.glow{position:absolute;border-radius:50%;background:radial-gradient(circle,rgba(245,197,24,.32),rgba(245,197,24,0) 66%);pointer-events:none}
.case-photo{flex:2 1 360px;min-width:0;position:relative;overflow:hidden;background:var(--navy);color:#fff;border-radius:var(--r);min-height:520px;display:flex;flex-direction:column;justify-content:flex-end}
.case-photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 30%;transition:transform .6s}
.case-photo:hover img{transform:scale(1.03)}
.case-photo .shade{position:absolute;inset:0;background:linear-gradient(180deg,rgba(17,28,66,0) 35%,rgba(17,28,66,.94) 85%)}
.case-photo .txt{position:relative;padding:clamp(24px,3vw,36px);display:flex;flex-direction:column;gap:10px}
.mono-amber{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--amber)}
.mono-mist{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--mist)}
.bars{display:flex;align-items:flex-end;gap:3px;height:110px;border-bottom:1px solid rgba(255,255,255,.3)}
.bars span{flex:1 1 0;min-width:0;background:rgba(255,255,255,.28);border-radius:2px 2px 0 0}
.bars span.hi{background:var(--amber)}

/* industry grid */
.cells{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(340px,100%),1fr));border-top:1px solid var(--ink);border-left:1px solid var(--line)}
.cell{padding:30px;min-height:230px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;flex-direction:column;justify-content:space-between;gap:24px;transition:background .25s}
.cell:hover{background:#fff}
.cell.focus{background:var(--amber-soft)}
.cell .name{font-family:var(--display);font-size:26px;line-height:1.1;font-weight:600;letter-spacing:-.02em}
.cell .top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(240px,100%),1fr));gap:32px 28px}
.step{display:flex;flex-direction:column;gap:12px;border-top:2px solid var(--ink);padding-top:20px}
.step:last-child{border-top-color:var(--amber)}
.step .n{font-family:var(--mono);font-size:13px;color:var(--amber-ink)}
.step h3{font-size:24px;line-height:1.15;letter-spacing:-.02em}
.step p{font-size:15px;color:var(--slate)}

/* CTA band */
.cta-band{background:var(--amber)}
.cta-band .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:36px;padding-top:clamp(64px,8vw,112px);padding-bottom:clamp(64px,8vw,112px)}
.cta-band h2{font-size:clamp(44px,6.4vw,100px);line-height:.95;letter-spacing:-.05em}

/* page hero (inner pages) */
.page-hero{padding-top:clamp(40px,5vw,72px);padding-bottom:48px;border-bottom:1px solid var(--line)}
.page-hero .inner{display:flex;flex-direction:column;gap:20px}
.page-hero .inner > *{max-width:980px}
.crumbs{font-size:14px;color:var(--slate);display:flex;flex-wrap:wrap;gap:8px}
.crumbs a:hover{color:var(--ink)}
.dark-hero{background:var(--ink);color:#fff;position:relative;overflow:hidden;border-bottom:0}
.dark-hero .crumbs,.dark-hero .lead{color:var(--mist)}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{font-size:13px;font-weight:700;padding:5px 12px;border-radius:999px;background:var(--ink);color:#fff}
.tag.amber{background:var(--amber);color:var(--ink)}
.tag.plain{background:#fff;color:var(--ink);border:1px solid var(--line);font-weight:600}

/* cards */
.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(330px,100%),1fr));gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;transition:transform .28s,box-shadow .28s}
a.card:hover{transform:translateY(-4px);box-shadow:0 24px 48px -24px rgba(17,28,66,.35)}
.card .media{position:relative;height:220px;background:var(--ink);overflow:hidden}
.card .media img{width:100%;height:100%;object-fit:cover;object-position:center 30%}
.card .media .stat{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;color:#fff}
.card .media .stat b{font-family:var(--display);font-size:54px;line-height:1;font-weight:600;letter-spacing:-.04em;color:var(--amber)}
.card .media .tags{position:absolute;left:14px;top:14px}
.card .media .tag{font-size:12px;padding:4px 10px}
.card .body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:8px;flex:1}
.card .body h3{font-size:23px;line-height:1.15;letter-spacing:-.02em}
.card .more{margin-top:auto;padding-top:10px;display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700}
.card .more svg{stroke:var(--amber-ink)}

/* filters */
.filters{display:flex;flex-direction:column;gap:12px;margin-bottom:28px}
.filter-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.filter-row .label{font-family:var(--mono);font-size:12px;color:var(--slate);width:72px}
.chip-link{display:inline-flex;align-items:center;min-height:42px;padding:0 16px;border-radius:999px;border:1.5px solid var(--line-strong);font-size:15px;font-weight:600;background:#fff}
.chip-link:hover{border-color:var(--ink)}
.chip-link.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.chip-link.on.amber{background:var(--amber);color:var(--ink);border-color:var(--amber)}

/* project detail */
.kpi{position:relative;overflow:hidden;background:var(--ink);color:#fff;border-radius:var(--r);padding:clamp(28px,4vw,52px)}
.kpi-grid{position:relative;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(210px,100%),1fr));gap:24px}
.kpi-grid b{display:block;font-family:var(--display);font-size:clamp(34px,3.6vw,54px);line-height:1;font-weight:600;letter-spacing:-.04em}
.kpi-grid span{font-size:15px;color:var(--mist)}
.kpi-grid b small{font-size:.42em;letter-spacing:-.01em;color:var(--amber);margin-left:4px}
@media (max-width:620px){.row{grid-template-columns:36px minmax(0,1fr) auto;padding:22px 4px}}
.detail{display:flex;flex-wrap:wrap;gap:48px;align-items:flex-start}
.facts{flex:0 1 340px;min-width:min(280px,100%);background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px;position:sticky;top:100px}
.facts dl{margin:0;display:grid;grid-template-columns:auto minmax(0,1fr);gap:12px 18px;font-size:15px}
.facts dt{color:var(--slate)}
.facts dd{margin:0;font-weight:600}
.prose{flex:999 1 560px;min-width:0;display:flex;flex-direction:column;gap:18px;font-size:18px;color:#2B3A6E}
.prose h3{font-size:32px;color:var(--ink);margin-top:20px}
.prose ul{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:8px}
.chart{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px}
.chart .cbars{position:relative;height:220px;display:flex;align-items:flex-end;gap:3px;border-bottom:2px solid var(--ink)}
.chart .cbars span{flex:1 1 0;min-width:0;background:var(--navy);border-radius:3px 3px 0 0}
.chart .cbars span.hi{background:var(--amber)}
.chart .days{display:flex;gap:3px;margin-top:6px}
.chart .days span{flex:1 1 0;min-width:0;text-align:center;font-family:var(--mono);font-size:10px;color:var(--slate)}
.seg{display:inline-flex;gap:4px;padding:5px;background:#fff;border:1px solid var(--line);border-radius:999px}
.seg button{font:inherit;font-size:14px;font-weight:600;min-height:40px;padding:0 18px;border-radius:999px;border:0;background:transparent;color:var(--ink);cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--ink);color:#fff}
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(220px,100%),1fr));gap:14px}
.gallery img{width:100%;height:320px;object-fit:cover;border-radius:10px}
.quote{background:var(--navy);color:#fff;border-radius:var(--r);padding:34px;margin:0;display:flex;flex-direction:column;gap:14px}
.quote blockquote{margin:0;font-family:var(--display);font-size:26px;line-height:1.3;font-weight:600}

/* solutions page */
.sol{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:40px;padding:48px 0;border-top:1px solid var(--line)}
.sol:first-child{border-top:1px solid var(--ink)}
.sol .ic{width:56px;height:56px;border-radius:14px;background:var(--amber);display:flex;align-items:center;justify-content:center}
.sol ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(240px,100%),1fr));gap:10px}
.sol li{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 16px;display:flex;gap:10px;align-items:flex-start;font-size:15px}
.sol li svg{flex:none;margin-top:3px;stroke:var(--amber-ink)}
@media (max-width:760px){.sol{grid-template-columns:1fr;gap:20px}}

/* industry page */
.facts3{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(280px,100%),1fr));gap:16px}
.fact{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px;display:flex;flex-direction:column;gap:8px}
.fact b{font-family:var(--display);font-size:48px;line-height:1;font-weight:600;letter-spacing:-.04em}
.fact small{font-size:13px;color:var(--slate)}
.probs{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(260px,100%),1fr));gap:16px}
.prob{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px;display:flex;flex-direction:column;gap:12px}
.prob .ic{width:50px;height:50px;border-radius:12px;background:#EEF0F4;display:flex;align-items:center;justify-content:center}
.prob h3{font-size:22px;line-height:1.15;letter-spacing:-.02em}
.prob p{font-size:15px;color:var(--slate)}
.plan-band{background:var(--ink);color:#fff}
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(230px,100%),1fr));gap:14px}
.plan{border:1.5px solid #33437A;border-radius:var(--r);padding:26px;display:flex;flex-direction:column;gap:10px}
.plan:first-child{background:var(--amber);color:var(--ink);border-color:var(--amber)}
.plan h3{font-size:24px;line-height:1.1}
.plan p{font-size:15px;color:var(--mist)}
.plan:first-child p{color:var(--ink)}

/* contact */
.contact{display:flex;flex-wrap:wrap;gap:48px;align-items:flex-start}
.contact .info{flex:1 1 300px;min-width:0;display:flex;flex-direction:column;gap:22px}
.contact .info a,.contact .info div.line{display:flex;gap:12px;align-items:flex-start;font-size:17px}
.form{flex:2 1 520px;min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:clamp(22px,3vw,36px);display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form .full{grid-column:1/-1}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:14px;font-weight:600}
.field input,.field select,.field textarea{font:inherit;font-size:16px;padding:12px 14px;border:1.5px solid var(--line-strong);border-radius:8px;background:var(--paper);color:var(--ink);min-height:48px}
.field textarea{min-height:140px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--ink);outline:none;background:#fff}
.radios{display:flex;flex-wrap:wrap;gap:10px}
.radios label{display:inline-flex;align-items:center;gap:8px;border:1.5px solid var(--line-strong);border-radius:999px;padding:10px 16px;cursor:pointer;font-weight:600;font-size:15px}
.radios input{accent-color:var(--ink)}
.hp{position:absolute;left:-9999px}
.alert{padding:14px 18px;border-radius:10px;font-weight:600}
.alert.ok{background:#E7F7EE;color:#14532D}
.alert.err{background:#FDECEC;color:#7F1D1D}
@media (max-width:620px){.form{grid-template-columns:1fr}}

/* footer */
.site-footer{position:relative;overflow:hidden;background:#0E1738;color:var(--mist);font-size:14px;line-height:1.6}
.site-footer .bar{height:4px;background:var(--amber)}
.site-footer .cols{display:flex;flex-wrap:wrap;justify-content:space-between;gap:40px;padding-top:64px;padding-bottom:44px;position:relative}
.site-footer h4{font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--amber);font-weight:500;margin-bottom:10px}
.site-footer nav{display:flex;flex-direction:column;gap:9px;min-width:160px}
.site-footer a:hover{color:var(--amber)}
.site-footer .brand{flex:1 1 280px;max-width:340px;display:flex;flex-direction:column;gap:18px}
.site-footer .bottom{border-top:1px solid #26346A;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:18px;padding-bottom:30px;font-family:var(--mono);font-size:12px;color:#A9B6D6;position:relative}
.site-footer .contact-col{display:flex;flex-direction:column;gap:12px;min-width:220px}
.site-footer .contact-col > *{display:flex;gap:10px;align-items:flex-start}
.btn-outline-dark{align-self:flex-start;display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 18px;border-radius:999px;border:1px solid #33437A;color:#fff;font-weight:600}

@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}